Sonics E-Press - Manual (Page 26)

Sonics E-Press Manual Page 26
used during the first weld period. This weld begins after the force trigger has been satisfied and
continues until Weld Distance 1 has been reached.
11.8 Weld Distance 1
– Weld distance 1 is the distance which ends the first weld period. When the system
has advanced to Weld Distance 1, the velocity and distance set-points will be adjusted for the second
weld parameters (Weld Velocity 2 and Weld Distance 2). The system does not stop between the
distance 1 and 2 settings unless distance 2 is set to zero. A zero (0) setting for distance 2 means that it
is OFF and will not be used. If Weld Distance 2 has a nonzero setting the system will
accelerate/decelerate to the new velocity.
11.9 Weld Velocity 2
– Weld Velocity 2 is set the same way as weld velocity 1. The system switches to
velocity 2 when distance 1 has been met and distance 2 is non-zero.
11.10 Weld Indicator (Green/Red Selection Box)
– Ultrasonic vibration can be turned on or off for the
second distance control. Clicking on the colored portion of the Indicator Box will toggle the color between
Red and Green. Red is used to turn ultrasonics off and green is used for ultrasonics on. This control box
is located at the extreme left edge of the form next to the Weld Velocity 2 and Weld Distance 2 settings.
The operation is the same as all weld settings, select the desired condition and click the SET button to
transfer the selections to the controller. If Weld distance 2 is equal to zero, then the distance 2 settings
are not used (it’s off) so the state of this Weld control does not matter. Ultrasonics cannot be turned off
during weld distance 1.
The hold timer, set on the GX power supply, must be long enough to allow the second distance
movement. If ultrasonics is programmed to be “OFF” during the second move (Velocity 2 and
Distance 2) then the hold must be set long enough to complete the movement and provide for
additional hold time. If sonics is programmed “ON” during the second move then hold time will
not need to consider the time required for the second move. The hold timer begins when the
ultrasonic pulse is terminated even if the head assembly is still in motion. (Refer to power supply
instruction manual for more information.)
11.11 Distance 2
– Distance 2 is set the same way as weld distance 1 except that distance 2 is allowed to
equal zero. When distance 1 has been met, the system will switch to velocity 2 until distance 2 is
reached.
11.12 Upper Part Tolerance
– The Upper Part Tolerance is set to allow for the variation in plastic part
dimension. Its purpose is to provide a reference location above the teach position that will allow the
motor controls to slow the head assembly and begin the search for the parts. This value should be large
enough to cover the widest variation expected so that the parts do not get crushed by the advancing
head assembly prior to the slow down point. This entry is always referenced from the “Teach Position”.
EX: An entry of 0.050 inches would tell the controller to slow down when the system reaches 0.050
inches above the normal unwelded parts dimension. The requirement is that the parts variation is
expected to be less than 0.050 inches above the taught position.
11.13 Lower Part Tolerance
– The Lower Part Tolerance is the same type of entry as the upper part
tolerance but on the lower side of the taught position. i.e. An entry of 0.070 inches would tell the
controller that the part should have been found prior to the taught location plus the lower part tolerance
value. If the part has not been found between the Upper and Lower Part Tolerance entries then maybe
it hasn’t been loaded or is missing. When the parts are not found in the defined window, the weld cycle
is terminated and the head assembly returns to the home position. Note that a permanent minus sign (“
-
“) is placed in front of the Lower Part Tolerance entry and setting to help indicate that the reference
means below the taught position. The values are always entered as positive numbers.
11.14 Ready Indication
– This indicator displays the present status of save or recall operations. It will
indicate any activity along with a progress bar which will appear along the bottom edge of the screen